Dampening mechanism for printing-presses.



APPLICATION PILED APR. 4, 1910.

Patented June 11, 1912.

3 SHEETSSHEBT 1.

v wue/mtoz M lt-n coon a tic mam W. H. SMITH. DAMPENING MECHANISM FORPRINTING PRESSES.

APPLICATION FILED APR. 4, 1910. v 1,029,239, Patented June 11, 1912.

3 SHEETS-SHEET 2.

W. H. SMITH.

DAMPENING MECHANISM FOR PRINTING PRESSES. APPLICATION FILED APR. 4,1910.

1,029,239, Patented June 11,1912.

3 SHEETSSHEET 3,

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QXM 1 cases mmm ' will ensue others skilled in the he to which I em nSTATES. PATENT OFFICE.

- I I 1 W I .WALTER H. SMITH, OF NILES, OHIO, ASSIGNOR TO THE HARRISAUTOMATIC PRESS 'of- Ohio, have invented certain new and usefulImprovements in Dampening Mechanism for Printing-Presses; and I dohereby declare the following to. be a full, clear, and exact descriptionof the invention, such as it appertains to make and use the same.

The primary object ofthis invention is to provide 'means forsimultaneously cont-rob ling the transfer'rolls of a lithographic orother printing press so that they may be moved simultaneously into andout of position, and-also be capable of being moved out p of andreturned automatically to-normal posit-ion independently of and withoutaffecting the controlling means.

A- further. object is to claims.

detail.

Referring to the drawings, 1 designates a frame which is shown as 'heldby capped screws 2 to the main press frame 3-, a por-j tion only ofwhich is shown. This frame 1 1 supports-a water or otherfluid-containing pan 4: wherein runs a roll 5 whose shaft is mounted infixed bearings. As customary,

a ductorroll 6 is intended to intermittently engage roll 5' and transfermoisture there-Q from to .a third roll, andsaid ductor roll,

. for this reason, is shown as journaled in arms 7 of ashaft-B which maybe oscillated by any suitable means.

The third roll constitutes the moisture distributing medium; it is shownat"9, and its shaftisjenrnaled inasleeve 10 which is fissd y h ldin h sf th f me by wet l serew1'2. Any suitable means may be -em- 4Specification of Letters Patent. Application filed April 4,1910. SerialNo. 553,270.

an arm 17 of sleeve 10. (See a provide means. whereby the transfer rollsmay be adjustedwhile the machine is'in motion, and also be' I readilymovable from their supports and capable of being replaoed withoutadjustment; relatively to the press cylinder with which they cooperate.1 L

' The invention will be hereinafter fully set. forth and particularlypointed .out in the W The. two rolls are carried by upper and In theaccompanying'drawings, Figure 1 is a side view, a portion of a printingpress; cylinder being shown. Fig. 2 is a similar view with the sideframeof the dampening; mechanism removed. Fig. 3is' a plan view of themechanism at one side of the press; Fig. 4 is a view in perspective.Fig. 5 is a- COMPANY, OF NILES, OHIO, A CORPORATION OF OHIO.

' mmrnnine MECHANISM FOR PRINTING-PRESSES.

Patented June 11, 1912.

' :ployed for rotating the distributing roll provided such rotation beat the face speed of the plate-carrying cylinder; According to the meansshown, a gear wheel 13 meshes with a gear wheel 14 of the plate-carryingcylinder 15, and also witlr the'zgear wheel 16 on the shaft of roll 9,causing the latter to revolve at the face speedof; the cylinderf Thisgear wheel 13 is mounted? on a stud of 18 and 19 designate upp r ancilower dampening rolls for transfeisting moisture from the maindistributing 'roll 9 to the plate of cylinder 15. It is the purpose ofmy invention to enable the rolls to be engaged by the plate or raisedportion of a cylinder, and automatically return to their normalpositions when free of such plate or raised portionfand likewise toenable the rolls to be adjusted while the machine is in motion, as wellas-be capable of beingsimultaneously thrown out of and into engagementwith the plate cylinder by means which will not interfere with theindependent i movement of each roll and its support. The

means shown for accomplishing these objects may be .varied, but thatshown is preferred.

lower arms 20 and 21, which are loosely supported by sleeve 10, said.arms at their free ends having circular openings to acthe bearings maybe withdrawn from the supporting arms by a lengthwise movement,

whereupon the journals of the rolls may be 100 passed outwardly throughslots in the ends The bearings have lugs 23 of the arms. for engagingadjustable stops 23 of the. arms, said stops serving as guides inrestoring the rolls and bearings.

or manually shifting the two dampening rolls simultaneously, that is tosay, for throwing them into or out of engagement with the late-carryingcylinder, I provide upper an lower crossed levers 24 and 25 110 movedout of their normal positions when These bearings are held,

. By turnin which are shown'in the form'of hubs loose on the fixedsleeve 10 and having long and short arms. With the short arms, (whichThenpper lever 24 controls the lower roll,

while the lower lever 25 controls the upper roll. By forcing or movingapart the long arms these levers will effect the simultaneousdisengagement of the rolls from the plate-cylinder and swing themcircumferent-ially around, the distributing roll 9 with which they arepreferably designed to remain infcontact. By adjusting the screws 28 therolls may be adjusted toward or away from the plate cylinder to regulatethe degree of contact therewith, and this adjustment may be effectedwhile the press is'in operation.

effect the shifting of the dampening rolls shown comprises a cam 30which lies between the long arms of the levers and is carried by a shaft31 having a handle 32. this shaft so as to present the narrow si es ofthe cam to the lon arms the latter will be moved apart (see ig. 2) theirhubs turning on the fixed sleeve 10. In this way the rolls will beremoved from the cylinder since the short arms of the levers transmitthe motion of the latter to I the two'roll-carrying arms. When the fiatsides of the cam are presented to the long arms of the levers the rollswill be moved into position to engage the plate, the upper roll and itsarm movin downward by gravity, although it may e accelerated'by springpressure. To effect the proper positioning of the lower roll Ipreferably employ a coiled spring 33 which acts on a rod 34 pivoted tothe outer end of the arm carrying the lower roll. This rod is shown aspassed through a relatively fixed part 35 against which the lower end ofthe spring bears. By this, means the lower dampeningroll will have, thesamedegree of contact with the plate cylinder as the upper roll.

The set screw 28 of the upper roll-carry- 1ng arm bears down upon theshort arm of the lower lever 25, while the set screw of the lowerroll-carrying arm bears up against the short arm of the upper lever 24,being so held by spring 33. In consequence, both rolls and theirsupports may be swung away, from normal position when the rolls are en-.gaged by the plate or raised ortion of a cyhnder, and upon being freerom the late ter return to position automatically. This movement of therolls and their supports has no effect upon, andis in no way preventedby, the manually-o erative means by which both rolls are simu taneouslymoved into and out of position.

t the particular means after the eccentric bearings are removed.

It will be understood that I have shown but oneside of; a press, andthat" the mechanism is substantially duplicated at the other side, withthis exception, however, that the gear wheel 13 and its supporting armare requiredon only one side'. It will also be understood that my.invention is not confined to the details of construction and ar- I thedrawings, but such means I believe'to be best adapted for attaining thedesired The means for actuatin the levers to ends. p

The advantages of my invention will be readily understood. the u'pperand lower dampening rolls may, with facility, be adjusted while thepress is It will be. seen that i in operation, both inrelation to theplatecarrying cylinder and to the moisture-distributing roll, and'thatby means of a single element they may be permitted to simulta neouslyengage with, or be disengaged from,.'the press cylinder, and thatindependently of such means each roll is capable of being moved awayfrom and auto matically returned to its normal position. There is nopositive connection between the rolls or their supporting arms and theshifting means. y

' claim as my 1nvention:-

' 1. In combination with a press cylinder,

a. distributing roll, upper and lower transfer rolls for engaging saiddistributing roll and said plate cylinder, manually-operable adistributing roll, upper and lower trans-- fer rolls for engaging saiddistributingroll I and cylinder, arms supporting said transfer rollsivoted concentricall to the axis of said istributing roll, upper andlower levers interposed between said arms, and" said arms and rolls inopposite directions, said arms'and rolls beingcapable of being moved outof, and returned to, their normal positions inde dent of said levers.

means for operating-saidlevers for-moving ,3. In comblnation wi h apress cylinder,

. a distributing roll ,,u pper and lower transfer I89,

rolls for engaging said distributing roll and cylinder, arms supportingsaid transfer rolls pivoted concentrically to the axis of saiddistributing roll, set screws carriedjby said arms, levers inte' sedbetween said arms and with which sa1d set screws engage, and means foroperating said levers to move said arms and rolls in oppositedirections, said rolls and their arms being capable of being movedindependently of said levers by the press cylinder.

4.,In comblnation, a distributing roll, arms loosely supportedconcentrically to the axis of said roll, transfer rolls carried by saidarms, each arm having an adjusting screw, levers fulcrumedconcentrically to the axis of said distributing roll and with which saidadjusting screws are designed to engage, and means connecting saidlevers for shifting thetransfer rolls.

5. In combination, a distributing roll, a fixed sleeve, arms looselysupported by said sleeve,"transfer rolls carried by,'s'aid arms, eacharm having an adjusting screw, levers fulcrumed on said sleeve and withwhich said adjusting screws are designed to engage, and means engaging.said levers for shifting the transfer rolls.

6. In combination, a distributing roll, a fixed sleeve in line with theaxis of said roll,

- arm's loosely supported by said sleeve, transfer rolls carried by saidarms, each arm having an adjusting screw, levers fulcrumed on sa1dsleeve and with whichsaid adjusting screws are designed to engage, andmeans engaging said levers for shifting the transfer rolls. I

7. In combination, a distributing roll, a

fixed sleeve in line with the axis of said roll,

arms loosely supported by said sleeve, transfer rolls carried by said.arms, each arm having an adjusting screw, levers. fulcrumed on sa1dsleeve having short arms with which said adjustingscrews engage, andmeans engaginglthe long arms of said levers for mov-, ing them to changethe positions of the transfer rolls. I

8. In combination a distributing roll, a fixed sleeve in line with theaxis of said roll,

arms loosely supported by said sleeve, transfer rolls carried by saidarms, each arm having an adjusting screw, levers fulcrumed on saidsleeve having short arms-with which said adjusting screws engage, a camlocated between the long arms of said levers, and means for actuatingsaid cam.

9. The combination with a distributing roll, of upper and-lower armshaving a common pivot concentrically to the axis of such distributingroll, transfer rolls carried by said arms, crossed levers fulcrumedconcentricallyto the axis of-said distributing roll for simultaneouslymoving both arms and rolls out of normal position, and permitting themto move into normal position, the upper roll being so moved by gravity,and a spring acting on the lower roll for returning t to, and holding itin, normal position.

, 10. The combination" with a main roll, of upper and lower arms havinga common pivot concentric to the axis of said roll, transfer rollsmounted in the outer ends of said arms, adjusting screws carried by saidarms, levers having hubs mounted concentrically to said arms, saidadjusting screws engaging the short arms of said levers, a shaft, a camthereon located between the long arms of said levers, and a springacting on the lower of said arms. 7

11. In combination with a distributing roll, upper and lower transfer,rolls incontact therewith, supports for said rolls having witnesses.

WALTER H.. SMITI-Ii ing openings Witnesses:

Eoamm WI'IHERBTAY,

A. D. Loor.

